Max Fleischer is working on a sketch of Betty at his drawing table, when quitting time arrives. After Betty says goodbye to "Uncle Max," Ko Ko jumps out of the inkwell and finds an uneaten candy bar, which he promptly gobbles, developing a terrible toothache in the process. Betty uses the art supplies to draw herself a dentist's office so that she can help Ko Ko, and then plays dentist. When she gets involved with the laughing gas ... well, just go watch! Imagine trying to publish a cartoon like this these days!